Image handler is installed on this website. I know it is and installed correctly. GD 2.3.11 is installed and enabled.

But it's not creating new images.

I'm so used to this working right out of the box that I'm now just confused.

I checked folder permissions. Can gd show up in the phpinfo but not work? Never seen it do that but this server is so locked down with mod security and its firewall that things just aren't normal.